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【简答题】
在平面直角坐标系 中,已知二次函数 的图象经过点 和点 ,直线 经过抛物线的顶点且与 轴垂直,垂足为 . 小题1:求该二次函数的表达式； 小题2:设抛物线上有一动点 从点 处出发沿抛物线向上运动,其纵坐标 随时间 ≥ )的变化规律为 .现以线段 为直径作 . ①当点 在起始位置点 处时,试判断直线 与 的位置关系,并说明理由；在点 运动的过程中,直线 与 是否始终保持这种位置关系? 请说明你的理由； ②若在点 开始运动的同时,直线 也向上平行移动,且垂足 的纵坐标 随时间 的变化规律为 ,则当 在什么范围内变化时,直线 与 相交? 此时,若直线 被 所截得的弦长为 ,试求 的最大值.
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参考答案：
举一反三
【多选题】历代为《孟子》作注，重要的有（）
A.
赵岐的《孟子注》
B.
朱熹的《孟子集注》
C.
焦循《孟子正义》
D.
杨伯峻《孟子译注》
E.
王云五《孟子今注今译》
查看完整题目与答案
【简答题】Cindy Hess began her automotive career as a Design and Development Engineer with Chrysler, in the fall of 1977.Today, she is Vice-President of Daimler Chrysler, and head of the Small Car Platform Engi...
查看完整题目与答案
【单选题】Section B Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You shoul...
A.
Americans are too attached to their cars
B.
public transportation in America is welldeveloped
C.
American cars are too fast
D.
automobiles endanger health
查看完整题目与答案
【单选题】1) Why do different types of libraries exist according to the passage?
A.
To offer different services to different people.
B.
To serve all members of the general public.
C.
To satisfy different needs of all potential users.
D.
To attract more users to use their resources.
查看完整题目与答案
【单选题】Car thefts go smoothly because______.
A.
the police have got involved in them
B.
the stolen cars sell well in the world market
C.
the thieves are familiar with the parking garages
D.
they are promoted by some international cooperation
查看完整题目与答案
【简答题】Why do people have different ways of learning?
查看完整题目与答案
【简答题】Cindy Hess began her automotive career as a Design and Development Engineer with Chrysler, in the fall of 1977. Today, she is Vice-President of Daimler Chrysler, and head of the Small Car Platform Eng...
查看完整题目与答案
【简答题】read the report on the following website: http://www.bbc.com/news/technology-25633663 and answer the following questions.You are supposed to finish the task before March 9th. 1. How are the following ...
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【简答题】Passage Two For more than 10 years there has been a bigger rise in car crime than in most other types of crime.An average of mote than two cars a minute are broken into,vandalized(破坏)or stolen in the ...
查看完整题目与答案
【单选题】Not only are cars involved in most of the traffic accidents, but they also __________ .
A.
contribute
B.
promote
C.
refer
D.
matter
查看完整题目与答案
相关题目：
【多选题】历代为《孟子》作注，重要的有（）
A.
赵岐的《孟子注》
B.
朱熹的《孟子集注》
C.
焦循《孟子正义》
D.
杨伯峻《孟子译注》
E.
王云五《孟子今注今译》
查看完整题目与答案
【简答题】Cindy Hess began her automotive career as a Design and Development Engineer with Chrysler, in the fall of 1977.Today, she is Vice-President of Daimler Chrysler, and head of the Small Car Platform Engi...
查看完整题目与答案
【单选题】Section B Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You shoul...
A.
Americans are too attached to their cars
B.
public transportation in America is welldeveloped
C.
American cars are too fast
D.
automobiles endanger health
查看完整题目与答案
【单选题】1) Why do different types of libraries exist according to the passage?
A.
To offer different services to different people.
B.
To serve all members of the general public.
C.
To satisfy different needs of all potential users.
D.
To attract more users to use their resources.
查看完整题目与答案
【单选题】Car thefts go smoothly because______.
A.
the police have got involved in them
B.
the stolen cars sell well in the world market
C.
the thieves are familiar with the parking garages
D.
they are promoted by some international cooperation
查看完整题目与答案
【简答题】Why do people have different ways of learning?
查看完整题目与答案
【简答题】Cindy Hess began her automotive career as a Design and Development Engineer with Chrysler, in the fall of 1977. Today, she is Vice-President of Daimler Chrysler, and head of the Small Car Platform Eng...
查看完整题目与答案
【简答题】read the report on the following website: http://www.bbc.com/news/technology-25633663 and answer the following questions.You are supposed to finish the task before March 9th. 1. How are the following ...
查看完整题目与答案
【简答题】Passage Two For more than 10 years there has been a bigger rise in car crime than in most other types of crime.An average of mote than two cars a minute are broken into,vandalized(破坏)or stolen in the ...
查看完整题目与答案
【单选题】Not only are cars involved in most of the traffic accidents, but they also __________ .
A.
contribute
B.
promote
C.
refer
D.
matter
查看完整题目与答案
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